const Mock = require('mockjs')
const { param2Obj } = require('./utils')

const router = require('./request/router')
const user = require('./request/user')

const mocks = [
  ...router,
  ...user
]

// 正面模拟
// 请谨慎使用，它将重新定义XMLHttpRequest，
// 这将导致许多第三方库失效（如progress事件）

function mockXHR() {
  Mock.XHR.prototype.proxy_send = Mock.XHR.prototype.send
  Mock.XHR.prototype.send = function() {
    if (this.custom.xhr) {
      this.custom.xhr.withCredentials = this.withCredentials || false
      if (this.responseType) {
        this.custom.xhr.responseType = this.responseType
      }
    }
    this.proxy_send(...arguments)
  }

  function XHR2ExpressReqWarp(respond) {
    return function(options) {
      let result
      if (respond instanceof Function) {
        const { body, type, url } = options
        result = respond({
          method: type,
          body: JSON.parse(body),
          query: param2Obj(url)
        })
      } else {
        result = respond
      }
      return Mock.mock(result)
    }
  }

  for (const i of mocks) {
    Mock.mock(new RegExp(i.url), i.type || 'get', XHR2ExpressReqWarp(i.response))
  }
}

module.exports = {
  mocks, mockXHR
}
